Tethered top with a spring mounted on the shaft for rewinding the cord



United States Patent O 3,139,699 TETHERED TOP WITH A SPRING MOUNTED ON THE SHAFT FOR REWINDING THE CORD Nicholas John Chuy, 5339 Burlingame, Detroit, Mich.; Ruth Chuy, heir of Nicholas Chuy, deceased Filed Oct. 23, 1961, Ser. N0. 146,895 1 Claim. (Cl. 46-61) This invention relates to toy devices such as are being manufactured today under the title of Yo-Yo.

The object of my invention is to provide a toy of spool-like formation with a new feature added thereto and, thereby, eliminating the unnecessary winding of a cable or a string around the neck of said toy for starting its back and forth rotation resulting from manual manipulation of said cable or string.

Various other objects and advantages of the invention will hereinafter become more fully apparent from the following description of the drawings, illustrating a presently preferred embodiment thereof, and wherein:

FIGURE 1 is a plan view of my Yo-Yo equipped with the necessary means for effecting the winding and unwinding of a cable;

FIGURE 2 is a side view elevation of my Yo-Yo;

FIGURE 3 is a cross-sectional view taken on the line 3 3 of FIGURE 2, and

FIGURE 4 is a fragmentary cross-sectional View of a neck of the spool showing an expansive at spring wound therearound and having a means to connect a cable or string thereto.

Referring specifically to the drawings wherein like reference characters designate like or similar parts, the toy comprises a pair of `annular discs 11 and 12, respectively, a shaft 13, an expansive coil spring 14, and a cable or string 15.

Reverting to the drawings, more particularly to FIG- URE 3, the toy 10 may be constructed of a pair of annular discs 11 and 12 which may be made of wood or plastic, or any other suitable material, and joined together by a shaft 13 which is cemented within the central openings 16 and 17 of said annular discs 11 and 12.

Said shaft 13 has the intermediate portion thereof provided with a diametrical enlargement which forms a common shoulder 18 to both openings 16 and 17, respectively. Said diametrical enlargement 18 has a limited length for the purpose of providing the necessary clearance between said discs 11 and 12 for the purpose as will hereinafter be more fully described.

Said disc 11 and said disc 12 are provided with restricted undercuts 19 and 20 to accommodate therein an actuating expansive coil spring 14. Said coil spring 14 has each terminal thereof secured within said undercuts 19 and 20 in the openings 21 and 22 of said discs 11 and 12, respectively.

Also, said expansive spring has the intermediate portion thereof provided with an eyelet 23 for securing a cable or string 15 thereto to operate said toy thereby.

Said coil spring 15 is of sufficient diametrical dimension in order to afford the necessary clearance between the shafts shoulder 18 and the body of the wire thereof for the expansion and contraction which is necessary to effect self-winding and unwinding of said cable or string when said Yo-Yo like toy is put into its spinning operation.

It will be realized that the clearance or groove 24 formed between said discs 11 and 12 by the shoulder 18 of said shaft 13 is for the purpose of accommodating therein the actuating cable or string 15 carried by said eyelet 23 of said expansive spring 14 when operation of said toy is effected by a manual thrust thereof into the downward direction which causes said expansive spring to wind and unwind said string until self-winding of said spinning toy is obtained.

Also it will be realized that a flat spring 25 may be used in the construction of said device, such a flat spring as is being used today for winding a clock mechanism. Such a spring 25 may be secured to said shaft shoulder 18 by a nail such as shown at 26 in FIGURE 4, the adjacent terminal of said spring having an opening 27 for connecting said cable or string thereto.

Various modifications and changes are contemplated and may obviously be resorted to, without departing from the spirit or scope of the invention as hereinafter dened by the appended claims.

I claim:

A toy of the class described comprising: a pair of spaced apart annular discs; each disc having an axial bore therethrough; a shaft having the ends thereof xedly mounted in the bores of the discs for connecting the discs together; each of said discs having undercuts on the inner sides thereof circumferentially surrounding said bores for providing a clearance in each disc around said shaft; a spring mounted around said shaft; said spring including two coiled sections; one of said spring sections being coiled in a direction opposite to the other spring section; said spring having an intermediate section provided with an eyelet and connecting the inner ends of the two coiled sections; the outer end of each coiled spring section being provided with a lateral projection secured to the adjacent disc within the undercut on the disc and adjacent the shaft; and a string secured to said eyelet.

References Cited in the file of this patent UNITED STATES PATENTS 2,773,328 Fraenkel et al Dec. l1, 1956 

